Examine source code of Warm Indian Summer

{
  "theme": {
    "images": {
      "theme_frame": "Indiansummer_01.jpg"
    },
    "colors": {
      "frame": "#316b22",
      "tab_background_text": "#fcfa7e"
    }
  },
  "version": "2.0",
  "name": "Warm Indian Summer",
  "manifest_version": 2,
  "description": "小春日和：柔らかなお陽様の光。とっても穏やかで暖かい。\n軽やかな雀の声が優しく響いて、少し肩の力を抜いて生きていこうと思う。"
}